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Finding the Fourth Proportional to 1,580.40, 2,370.42 and 656.10

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Solution

The fourth proportional to 1,580.40, 2,370.42 and 656.10 is: 984.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.40 : 2,370.42 = 656.10 : x
  2. Step 2: Convert to fraction form
    1,580.40/2,370.42 = 656.10/x
  3. Step 3: Cross multiply
    1,580.40x = 2,370.42 × 656.10
  4. Step 4: Simplify right side
    1,580.40x = 1,555,232.56
  5. Step 5: Solve for x
    x = 1,555,232.56/1,580.40
  6. Step 6: Final answer
    x = 984.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.